[MBCook]

I sympathize with the problem. Some of the apps on my iPhone have become bigger since they're universal and now include the retina iPad graphics. I agree with some of the other commenters here that the ideal solution would be to not download/remove the unnecessary graphics once on device.

But as I've run down on space, I've started to notice how odd various app's sizes are. There seems to be very little correlation between what I expect and the actual value. Here are some examples from my applications:

First, some apps that have sane sizes

  Infinity Blade - 1 GB
  Rage - 830 MB
  Ghost Trick - 531 MB
  Groove Coster - 154 MB
  Steambirds Survival - 60 MB
  Doodle Jump - 20 MB

But many apps seem to use way more space than I would ever expect:

  Worms 2 Armageddon - 688 MB
  Worms - 209 MB
  Catan - 171 MB
  Boggle - 104 MB (really? REALLY?)
  XFinity (Comcast App) - 41 MB (has downloaded another 50 on my device)